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Discussion Starter · #1 ·
Ok so we put on LM1 mufflers and cars sounds great! now after warming up when Idling like at the drive through the car idles hard, then the check engine light comes on, and the red lighting bolt flashes. the code is bank 1 and 2 lean. how can i fix this. the only change was the install of the mufflers..
 

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Do you have a catch can installed? If so, check the hose connections. On my first oil change at the dealer, they knocked off one of those hoses and this is the same issue I had.
 

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Discussion Starter · #4 ·
Also when the car is in park and you rev the engine the RPM hold and 1500 for about 3-5 seconds then fall. Also the electronic throttle control light comes on with the ESP light then a rough idle
 
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